Electric receptacle.



G. W. GOODRIDGE.

ELECTRIGAL'REGEPTAGLE. APPLIOATION FILED MAY 6, 1909.

940.526. Patented Nov. 16, 1909.

WYTNE-SSES \N"ENTOR 4. WM WW 4% I A'TTO R N EYS GILBERT W. GOOIDRIDGE,BRIDGEPCRT, CONNECTICUT, ASSIGNOR TO THE BRYANT ELECTRIC COMPANY,BRIDGEPCRT,

NECTICUT.

CONNECTICUT, A CDRPORATION OF CON- ELECTRICAL RncEPTAcLE.

Specification of Letters Patent. Patented N 16, 19619,,

Application filed May 6, 1909. Serial No. 494,303.

To all whom it may concern:

Be it known that-l, GILBER'DV. Goonnmon, a citizen of the United Statesof America, and residing at Bridgeport, 1n the county of airfield andState of Connectiout, have invented a certain new and useful Improvementin Electrical Receptacles, of which the following is a specification.

My invention relates to electrical re'cepta-' cles and particularly toshell receptacles of the type commonly employed in incandescent lampsockets, and screw plug receptacles of various sorts, such for instanceconnection blocks, fuse plug blocks and the like, my object being toimprove the construction of such shells in the particular pointed outhereinafter.

In the accompanying drawings, Figure 1 is a broken section of a screwplug receptacle to the shell of which my invention hasbeen applied; Fig.2 is a vertical sectionof ascrew shell showing my invention inanothenform; Fig. is a perspective view of said shell partially brokenaway to show a third .form; and'Fig. 4 is a section of portion of theshell showing a detail o f-cone struct-ion.

Itis customary to make the screw shells for plugreeeptacles, sockets,etc. of very thin metal wh ch may be drawn up in suit able diesto thedesired shape, and then to punch out of the base an aperture for theadmission of the center contact. This aperture usually extends acrossthe base and partially up the sides of the shell, leaving the.- sides ofthe base as inwardly projecting flanges which are perforated to receivethe screws by means of which the shell is fastened to its base.l'nasmuch as the shell is of quite thin metal however, the flanges thusformed are not strong and -it not infrequently happens,particularly inthe-case of attacl'in'ient plug and fuse plug receptacles, that on thescrewing in of the attachment or fuse plug, the screws are toin whollyor partially through these flanges and theushcll thereby loosened on thebase. The strain on the flanges of the shell if the plug still rotatedafter its projectingcenter pontact has reached the center contact of thereceptacle, will be readily understood. To obviate this defect I proposeto make the screw shell with a reinforced securing flange. This may beaccomplished in any suitable manner. Thus in Fig. l the flanges 6 on theshell 5 are shown. as substantially twice as heavy as the metalof-the'shell proper; this being accomplished by. using heavier sheetmetal and drawing out to the desired thinness only that portion whichforms the screw shell. proper. The same result may be more readilyaccomplished however, by usingthe customary thin metal and folding backupon the flange 2. suitable portion 7 of the base,

which isordinarily cut away as waste. This is shown in cross SQCiJlOIl'1n- 1 1g. 2. \Vhile it is not necessary that this folded back portioncover the entire flange (3, a neatcr and more finished shell is producedwhen this is done, as shown in Fig. 3. In the latter are, the flangeonthc left hand side is shown with the reinforcing base portion shapedthereto and rolled over in place, with the perforation 8 for thesecuring screw passing through both thicknesses of mctah The righthand'sidc of this figure shows the reinforcing base portion being rolledover 7 into place.

The partial section illustrated in Fig. 4 shows the customary offsettingof the metal adjacent the perforation for the securing screw 9 toreceive the head of the latter.

Other ways of accomplishing the results above described may be readilydevised and I do not limit myself 'to the precise struc-. tures shownbut I claim as my invention.

1. A screw shell for an electrical receptacle having securing flanges,portions of said receptacle being bent over upon said flanges toreinforce the same for the purphse specified.

2. A screw shell for an electrical receptacle having-a base cutaway toform securing flanges, portions of said base being rolled over upon saidflanges to reinforce the same for the purpose specified.

A screw shell for an electrical iete'ptacle having a base cut away toform securing flanges, portions of said base being shaped to and rolledover upon said flanges to reinforce the same for the purpose specified.

In testimony whereof 'I have signed my name to this specificatiomin thepresence of two subscribing witnesses,

GILBERT V. GUODRIDGE;

Wit nesscs:

A. H. Jones, I I. W Gonnsnonowur.

